Lucas Type Auto Advance Unit Springs (1 PAIR) - 54415642 Wipac etc) from 1971 & On

etc) from 1971 & On

M Part number is 97-4575 or H4575

these little rubber boots become Brittle and start to Crack over time

New BSA Unit Twins Late 1969 A50 & A65 Gear Change Cam Plate

Gear boxes that use the early style "plunger" MUST use the shift plate we stock under 57-0500 / T500 and later models that use the "Leaf Spring" set-up must use the plate 57-4055 / T4055

Lucas Type Auto Advance Unit Springs (1 PAIR) - 54415642 Wipac etc) from 1971 & OnNew Lucas Type Auto Advance Spring Set. It is crucial that your auto advance springs are in good working order. In detail, if your springs become worn and loose tension, it will cause erratic idle especially when the RPM's are decreasing. This new auto advance spring set has the right tension which will allow your motorcycle to rev smoothly throughout the RPM range and smoothly at idle. Works with most Triumph, BSA, & Norton singles, twins and triples